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Finding the Fourth Proportional to 155,817.70, 215,028.42 and 84,197.72

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Solution

The fourth proportional to 155,817.70, 215,028.42 and 84,197.72 is: 116,192.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,817.70 : 215,028.42 = 84,197.72 : x
  2. Step 2: Convert to fraction form
    155,817.70/215,028.42 = 84,197.72/x
  3. Step 3: Cross multiply
    155,817.70x = 215,028.42 × 84,197.72
  4. Step 4: Simplify right side
    155,817.70x = 18,104,902,699.20
  5. Step 5: Solve for x
    x = 18,104,902,699.20/155,817.70
  6. Step 6: Final answer
    x = 116,192.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.